NatWest has begun sending emails to its customers detailing significant changes to Individual Savings Account (ISA) rules that will take effect from April 6, 2027, following government reforms aimed at encouraging retail investment.
Key Changes for Under-65s
From April 6, 2027, the total annual ISA allowance will remain at £20,000, but the amount that can be deposited into a cash ISA will be capped at £12,000 for savers under 65. The remaining £8,000 must be placed into non-cash options, such as a stocks and shares ISA. Customers aged 65 or over will not be subject to this restriction and can still put their entire £20,000 allowance into a cash ISA.
Additionally, transfers from a stocks and shares ISA to a cash ISA will no longer be permitted for under-65s. A 22% charge will apply to any interest paid on cash held within a stocks and shares ISA, and these accounts can no longer consist entirely of cash-like investments.
Protecting Existing Savings
NatWest has assured customers that any tax-free funds accumulated in a cash ISA before April 5, 2027, will remain fully safeguarded and continue to earn tax-free interest. The bank stated: 'Any money you already hold in a Cash ISA, up until April 5, 2027, should not be affected and will remain tax-free.'
The government has introduced anti-circumvention measures to prevent savers from bypassing the £12,000 cash limit. These rules prohibit subscribing up to £20,000 in a non-cash ISA and leaving it long-term, transferring those funds to a cash ISA, or using the funds to purchase wholly cash-like investments.
Encouraging Investment
The reforms are designed to encourage retail investment, with the government stating: 'In order to protect the integrity of the new cash ISA limit and ensure the reforms achieve their intended aim of encouraging retail investment so savers get more from their investments/savings.'
NatWest's email, titled 'ISA changes in 2027 - are your savings in the right place?', advises customers: 'Now could be a good time to think about how you'd like to use your ISA allowance in future - and whether your savings are in the right place for your goals.'
NatWest's Customer Base
NatWest is one of the UK's top four clearing banks, with a market capitalisation of approximately £46.67 billion. It serves over 20 million customers, including one million business accounts, and maintains over 526 branches and 3,400 ATMs across the country.
The proposals are still subject to legislation, and further details are available on the government website.



